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- By CategoryMixed GasesGas Comp Amount299.9950000Gas Comp Amount199.9967000 95.0000000 99.9922000 78.6500000 99.7885000 99.9500000 80.7375000 99.9730000 50.0000000Gas Comp 1TUNGSTEN HEXAFLUORIDE NITROGEN PPM SULFUR DIOXIDE NITROUS OXIDE PROPANE PPM CARBONYL SULFIDE